Kitchen range



Janf, 1953 E, ERNST 2,624,329

KITCHEN RANGE Filed July 17, 1946 www Patented Jan. 6, 1953 UNITEDSTATES PATENT oFFlcE Application July 17, 1946, SeralNo. 684,327 InSwitzerland April 15., V1943 2 Claims.

This invention relates to kitchen ranges.

Kitchen ranges for the employment of solid 'fuels as Well as kitchenrangeswith lelectric hea'ting are known. The former class df kitchenAranges has, 'as compared with the latter, the dis- "fuels, thedisadvantage that their maximum heat output is limited, so thatanincrease inthe heat output, which 'may be desirable in special cases,is impossible. Electrical lcooking vranges have also vthe disadvantagethat they cease to operate when disturbances occur in the mains. vIthas, it vis true, already been proposed Vto provide a lkitchen rangewith electrical cooking plates which, in case of necessity, can also beheated by Wood -or coal firing. However, such devices have not proved tobe successful, because the electrical vcooking plates are, as is known,destroyed after a short time by the Wood 'or'coal firing.

The invention is concerned with the problem of providing a kitchen rangein which the "advantages of the two aforesaid classes of kitchen rangeJare combined, so that the 'disadvantages of one system 'or the "other"are quite inappreciable. According to the invention, this is achievedby virtue 'of the vfact that the range comprises one A'or more 4cookingrpilates that is or are heatab-le With 'solid fuels `as well as one ormore electrical :cooking 4plates or, instead, the same number 'ofgas-heated cooking plates,an`d that level of the `1grate which servesfor supporting the solid fuel is, during the operation of the range,adjustable "by means ycan be operated from `a position on van outer sideof the range.

A further feature of the invention lies inthe arrangement of a Waterreceptacle Which yserves v:for the production of hot Water and is'arranged zaround vthe fire chamber, it lbeing possible toreguv'late'thetemperature of the Water byalteringthe 'level 'of thegrate. The outputof heat 'to heatable Iclrarnbers `that can be "employedfor baking or *heating purposes can be regulated at the same time lbythis level adjustment. The range comprises, in addition to theelectrical cooking plates, vone or more electrically heatable`cl'iarnbers 'that 'can be v`employed for baking or heating purposes. K-A 'cooling chamber may also'lbe builtin.

The portion of the vrange vthat is to be heated with solid fuels or 'theelectrical portion of the range can `be roperated by itself or bothportions of the range can be operated at the same tima-'so 'that thedisadvantages attached to the individual range systems areinappreciable. 'Owing 'to Ithe Yfurther development of the range for thepro- 4duction-of'hot Water for heating, Washing or other purposes, theseparate erection of a hot-water produc-ing installation is renderedsuperfluous.

Examples of embodiments of the kitchen range according to the inventionare represented in the 'accompanying drawings, of which 1 is -a verticallongitudinal section through one embodiment of the range;

Fig. 2 is a ver-tical cross-section through the electrically heatablepart' thereof;

Fig. 3 is a corresponding cross-section through the part that is heatedby .means of solid fuels;

Figs. 4 and 5 show a `damper arrangement in the electrically heated partof the range 1in two different positions and `on a larger scale; whilstFig. 6 isa vertical cross-section through the lire chamber of a lsecondVembodiment of the range.

:The-range shown `in Figs. l to 5 possesses four yelectrical cookingplates 2. The outer Wall 25 of the l.range is formed of refractory`bricks which, if

required, maybe covered with enamelled sheet metal. 'Inside the girechamber there is located, spaced from the wall formed by 'the'wat'erreceptacle 20, -a -g-rate which is Aformed by vertical bars '26. Theends of the bars of the grate 3 engage in the interspaces ofthe 'barsofthe vertical grate. In this way, on altering the level of the grate 3,the spaces between the bars '26 are cleanedl from -any 4pieces of fuelor ashes lodged therein. By the arrangement of the vertical grate, yagoed draught action is obtained in the fire-chamber I2, especially-alongthe walls ofthe Water receptacle 20 and, `further, the `fuel on `thegrate 3 is prevented ;from coming into contact with any condensed waterthat may be formed von `the falls yoi* vthe receptacle 20. Thisembodiment of the vrange is `therefore preferablysuitable for Workingwith coal, it being possible to use secondary air, which `enters belowthe grate, as combustion air which `canarrive into the Are chamberpractically unhindered, regardless of Whether the fuel resting on theAgrate is ,packed tightly or loosely.

The electrical part of the range is separated from'the fire .chamber l2by a partition 2'! of refractorybricks which lies Ybehind the waterrecep- `v'tacle 20. Located'fbeneath the cooking platesi. is the ibakingoven 2-3, which is lheatable` by `electrical heating elements 28, andbeneath the baking oven 23 there is located the chamber 24, which isheatable by heating elements 29 and which can be employed as baking ordrying tube. The ceiling and the cor of the baking chamber 23 are eachformed by a metal plate 36. Above the upper and beneath the lowerheating elements there is located an insulation 3l consisting of anasbestos layer and a layer of glass fibres or the like, so that lossesof heat by radiation are reduced to a minimum. The heating elements 23and 29 are connected to a switch, as are also the cooking plates 2, sothat the outputs of heat of the individual heating parts can beregulated as desired,

One wall 33 of the heatable chamberd is provided with openings which canbe partially or completely closed as required by adjustable dampers 34.For this purpose the dampers 3d are hinged to a tie rod 35 and can berocked into s the positions shown in Figs. 4 and 5 0r into intermediatepositions between these positions, so that the heat in the chambersilcan be conveniently regulated.

Instead of the grate 3 the level of which is adjustable by means ofscrew spindles, the grate may, as shown in Fig. 6, be mounted on lazytongs 36 the two arms of which are each hinged on a guide member 3l.These two guide members are mounted on a screw spindle 3S having arighthanded and a left-handed screw thread. The screw spindle 38 can berotated by means of a hand wheel 9 through bevel wheels 'i and thelinkage 8. The two guide members 3l move, according to the direction ofrotation, towards each other for the upward movement of the grate S oraway from each other for the downward movement of the grate.

The driving of the toothed wheels for shifting the grate during theoperation can be effected by means of an electromotor which is ltted inthe range and can be switched in and out, known means being providedwhich enable the direction of rotation of the spindles to be reversed,so that the grate can be raised or lowered as required.

In the case of all embodiments of the range, toothed wheels and screwspindles are employed for altering the level of the grate 3 during theoperation for the purpose of regulating the heat.

This alteration of the level of the grate can, however, be'efected withother means, for example hydraulically. For purpose, the grate may bemounted on a vertical rod which carried a piston that is displaceable ina cylinder. A pressure fluid can be introduced into the cylinder either.fr

below or above the piston, according to whether the grate is to beraised or lowered, by means of a pump, with the simultaneous employmentof known reversing members.

The possibility of adjusting the level of the grate is of considerableinfluence on the consumption of fuel. This construction ensures a moreeconomical operation than in the case of the known ranges, so that,owing to the smaller consumption of fuel alone, a rapid paying olf ispossible. l

lThe heatable chamber 2s with its heating elements 29 may be dispensedwith and replaced by a cooling chamber. The refrigerating machinenecessary for this purpose can be suspended in the known manner on theceiling 3 l. lIhe cooling chamber which, on account of its insulation,cannot be influenced by the operation of the range, can be divided in asuitable manner by horizontal and vertical partitions for accommodatingthe victuals and drinks that are to be kept cool.

Departures from the embodiments represented and described are possible.In particular, a plurality of cooking plates l for heating with solidfuels or a different number of electrical cooking plates 2 than thatrepresented may be provided. Similarly, more than two chambers that canbe Yused for baking or heating purposes may be arranged or the watertank may be dispensed with. Also, instead of the electrical cookingplates, the same number of gas-heated cooking plates may be provided, inwhich case, naturally, the chambers 23 and 24, which can be used forbaking or heating purposes, would be arranged for gas heating.

The expression a source of heat that can be put into and out ofoperation instantaneously, which is used in the claims, is meant tocover electrical heating means and also means for heating by gas.

What I claim is:

l. A kitchen range comprising in combination, a cooking surface; a regrate located beneath said cooking surface, said fire grate having afirst side adjacent to said cooking surface and a second side distantfrom said cooking surface and said fire grate having a plurality ofprojections located the outer periphery thereof; means for movingsaidfire grate toward and away from said cooking surface; a hot waterreceptacle mounted about said nre grate and spaced therefrom, saidreceptacle extending from said cooking surface toward said lire grateand extending a substantial distance beyond said second side of saidfire grate; a plurality of bars mounted between said grate receptacle insubstantially parallel relation with respect to said receptacle andspaced therefrom, said bars being spaced from each other so as toprovide spaces therebetween and said bars also extending from saidcooking surface toward said grate and extending a substantial distancebeyond said second s' `e of said grate, the said projections of said egrate extending into said spaces between said bars, whereby saidprojections, by movement of said grate, remove any material locatedbetween. said bars so as to prevent the accumulation oi' such material,and whereby said bars prevent the material being burned on said gratefrom contacting said receptacle.

2. A kitchen range comprising in combination, a cooking surface; a firegrate located beneath ld cooking surface, said fire grate having a iirstfr" e adjacent to said cooking surface and a second e distant from saidcooking surface and said lire grate having a plurality of projectionslocated at the outer periphery thereof; means for moving said lire gratetoward and away from said cooking surface, said means comprising anexternally threaded bolt connected at one end thereof to second side ofsaid grate and extending in a direction away from said cooking surfaceand grate, a tubular member having external and internal threads andengaging said bolt with its internal threads, and a rotatably mountedhollow member having internal threads engaging said external threads oi'said tubular member; a hot water receptacle mounted about said firegrate and spaced therefrom, said receptacle eX- tending from saidcooking surface toward said fire grate and extending a substantialdistance beyond said second side of said nre grate; a plurality of barsmounted between.v said grate and receptacle in substantially parallelrelation with respect tosaid receptacle and spaced therefrom,

5 said bars being spaced from each other so as to provide spacestherebetween and said bars also extending from said cooking surfacetoward said grate and extending a substantial distance beyond saidsecond side of said grate, the said projections of said fire grateextending into said spaces between said bars, whereby said projections,by movement of said grate, remove any material located between said barsso as to prevent the accumulation of such material, and whereby saidbars prevent the material being burned on said fire grate fromcontacting said receptacle.

EDOUARD ERNST.

REFERENCES CITED The following references are of record in the le ofthis patent:

6 UNITED STATES PATENTS Number Number Name Date l Sheppard Nov. 27, 1900Lucerino Dec. 1, 1914 FOREIGN PATENTS Country Date Great Britain of 1902Germany July 7, 1908 Great Britain of 1909 France Dec. 24, 1913 GreatBritain Dec. 21, 1921 France Aug. 31, 1928A Germany Jan. 5, 1929 DenmarkJune 17, 1929 Denmark Sept. 9, 1929

